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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

Sudbury Water District

Chloromethane is an industrial solvent, aerosol propellant and a refrigerant. It also forms as a byproduct of water disinfection. The EPA classifies chloromethane as possibly carcinogenic to humans.

MORE ABOUT THIS CONTAMINANT

 

117

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013ND120ND
2014ND200ND
2015ND160ND
2016ND130ND
20170.0847 ppb172ND - 0.760 ppb
2018ND200ND
2019ND190ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 2.69 ppb

The EWG Health Guideline of 2.69 ppb for chloromethane was defined by the Environmental Protection Agency as a benchmark for testing under the Unregulated Contaminant Monitoring Rule program. This health guideline protects against cancer.

ppb = parts per billion

All test results

Date Result
2013-05-16ND
2013-05-16ND
2013-05-16ND
2013-05-16ND
2013-05-16ND
2013-05-16ND
2013-11-20ND
2013-11-20ND
2013-11-20ND
2013-11-20ND
2013-11-20ND
2013-11-20ND
2014-01-07ND
2014-01-07ND
2014-01-07ND
2014-01-07ND
2014-05-06ND
2014-05-06ND
2014-05-06ND
2014-05-06ND
2014-07-08ND
2014-07-08ND
2014-07-08ND
2014-07-08ND
2014-07-08ND
2014-07-08ND
2014-07-23ND
2014-07-23ND
2014-10-21ND
2014-10-21ND
2014-10-21ND
2014-10-21ND
2015-01-06ND
2015-01-06ND
2015-01-06ND
2015-01-06ND
2015-04-16ND
2015-04-22ND
2015-04-22ND
2015-04-22ND
2015-04-22ND
2015-07-07ND
2015-07-07ND
2015-07-07ND
2015-07-07ND
2015-07-07ND
2015-07-07ND
2015-10-06ND
2016-01-05ND
2016-03-15ND
2016-03-15ND
2016-04-06ND
2016-04-06ND
2016-07-12ND
2016-07-12ND
2016-07-12ND
2016-07-12ND
2016-07-12ND
2016-07-12ND
2016-10-04ND
2016-10-04ND
2017-01-10ND
2017-01-10ND
2017-01-10ND
2017-01-10ND
2017-04-04ND
2017-04-04ND
2017-04-04ND
2017-07-11ND
2017-07-11ND
2017-07-11ND
2017-07-11ND
2017-07-11ND
2017-07-11ND
2017-10-030.760 ppb
2017-10-030.680 ppb
2017-10-03ND
2017-10-03ND
2018-02-06ND
2018-02-06ND
2018-02-06ND
2018-04-10ND
2018-04-10ND
2018-04-10ND
2018-04-10ND
2018-07-10ND
2018-07-10ND
2018-07-10ND
2018-07-10ND
2018-07-10ND
2018-07-10ND
2018-07-10ND
2018-07-10ND
2018-07-10ND
2018-10-10ND
2018-10-10ND
2018-10-10ND
2018-10-10ND
2019-01-08ND
2019-01-08ND
2019-01-08ND
2019-04-02ND
2019-04-02ND
2019-04-02ND
2019-07-02ND
2019-07-02ND
2019-07-02ND
2019-07-02ND
2019-07-02ND
2019-07-02ND
2019-07-02ND
2019-07-02ND
2019-07-16ND
2019-10-08ND
2019-10-08ND
2019-10-08ND
2019-10-08ND